Rotary cutter.



Patented Oct. 3, I899. G. D. GILLETTE.

ROTARY CUTTER.

ATTORNEYS WITNESSESI No. 634,2l0. Patented Oct. 3, I899. G. D; GILLETTE.

BOTARYGUTTER.

(Applicaticn filed June 20, 1896.)

(No Model.) 3 Sheats-Shaet 2.

- 4 INVENTOR.

ATToRNEYs;

OTO-LWHO. wnsmna'rou o c No. 634,210. Patented Oct. 3, I899.

G. D. GILLETTE.

BDTABY CUTTER.

(Application flied June 20, 1886.)

(No Model.)

3 Sheets-Sheet 3,

WITNESSES? m fi d. \INVEN'I-OR' w'gaw wu/if ATTORNEYS.

' ATENT EFF-to.

GEORGE D. GILLETTE, OF OSWVEGO, NEW YORK, ASSIGNOR TO D. ll.

BURRELL & 00., OF LITTLE FALLS, NEWV YORK.

ROTARY CUTTER.

SPECIFICATION fonningpart of Letters Patent No. 63%,210, dated October3, 1899.

Application filed June 20, 1896. Serial No- 596,233. (No model.)

To all whont it maly concerm Be it known that LGEORG D. GILLETTE,

a citizen of the United States, residing at Os wego, in the county ofOswego and State of New York, have invented a new and useful Improvementin Rotary Cutters for Woodworking, of which the following is aspecification.

This invntion relates to that class of cutters which are employed forcutting round bars or rodsfor instance, cnrtain-rollersfrom boards orplanks.

The object of my invention is to produce an efficient cutting-tool forthis purpose.

In the accompanying drawings, consisting of three sheets, Figures 1 and2 are side elevations of my improved cutter viewed from opposite sides.Fig. 3 is a front elevation of the cutter viewed in the direction of thehorizontal arrow 3, Fig. 1. Fig. 4 is a top plan View of the cutterviewed in the direction of the vertical arrow 4, Fig. 1. Fig. 5 is afront elevation of the cutter viewed in the direction of the obliquearrow 5, Fig. 1. Fig. 6 is an outside elevation of the right-hand maincutter and clearing-cutter. Fig. 7 is a front elevation, Fig. 8 aninside elevation, and Fig. 9 a top plan view, of the same cutter. Fig.10 is an outside elevation of the left-hand main cutter andclearing-cutter. Fig. 11 is a front elevation, Fig. 12 an insideelevation, and Fig. 13 a top plan view, of the same cutters. Fig. 14 isa side elevation, on a reduced scale, showing, two of my improvedcutters operating upon the upper and lower sides ofa board. Fig. 15 is adiagram showing a cross-section of the round bar which is produced bythe cutters, and also showing the cut produced by each cutter.

Like letters of reference refer to like parts in the several figures.

My improved cutter-head consists of two main cutters A A, which arearranged side by side and nearly at right angles to each other and whichout each one-quarter of the circle bounding the round bar or rollerwhich is'to be produced, and two outside clearing-cutters B B, which cutaway the wood on the outer sides of the cutting edges of the maincutters and provide ample clearance for the latter. For cutting acomplete round bar or roller from a board or plank two of my improvedcutter heads are employed, one operating against the upper side and oneagainst the lower side of the board or plank, as indicated in Fig. let,one cutter-head cuttingthe upper half and the other the lowerhalf of theround bar. The main cutter A is the one which is on the right-hand sideof the observer when viewing the cutter-head from the front, with theupper portion of the cutter-head rotating toward the observer, and themain cutter A is on the left-hand side. The right-hand clearing-cutterBis arranged on the outer side of the right-hand main cutter A and thelefthand clearing-cutter B on the outer side of the left-hand maincutter A. Each of the cutters is provided on diametrically oppositesides with two wings, in which the cutting edges are formed and whichmay have the same width as the body orhub portion of the cutter.

Each of the main cutters has its peripheral or outer face 0 providedalong itsinner corner with a concave d, extending from the front to therear end of the outer face'of the cutter. The cross-section of thisconcave is such as to produce one-fourth of the round bar or rollerwhich is to be produced and to extend slightly beyond the quarter-circleat each edge, so that the cut produced by each main cutter slightlyoverlaps the cuts produced by the adjacent main cutter. This isillustrated by the diagram Fig. 15, in which the cut produced by theright-hand main cutter of the upper cutter-head extends from 1 to 1, thecut produced by the left-hand cutter of the same cutter-head from 2 to2, the cut pro duced by the right-hand cutter of the lower cutter-headfrom 3 to 3, and the cut produced by the left-hand cutter of the lowercutter from 4 to 4:.

. Each wingof the right-handcutter A is provided with a front face 6,Figs. 1, Al, 6, and 7, which is inclined laterally, rearwardly, andoutwardly, so that each wing has at its front corner a cutting edgeextending from the inner front corner e in the lower edge of the concaveto the outer rear corner 6 in the peripheral face 0 of the cutter. Theinclined front face 6 is cut obliquely into the outer front portion ofthe cutter and may be connected with the hub portion of the cutter by aforwardly-inclined portion 6 or in any other suitable manner. Each wingof the left-hand cutter A is provided with a similar front face f, Figs.2, 3, 10, and 11, which is inclined laterally, rearwardly, andoutwardly, so that the inclined front faces of the two main cuttersincline rearwardly and outwardly, but in opposite directions, the frontfaces on the right-hand cutter to the right and those on the left-handcutter to the left. The cutting edge of each front face f on theleft-hand cutter extends from the inner front corner f in the lower edgeof the concave to the outer rear corner f 2 in the peripheral face 0 ofthe cutter. The inclined front faces f are connected with the hubportion by forwardlyinclined portions f or in any other suitable manner.

Each of the main cutters has two cutting edges, and therefore makes twocuts at each revolution.

The clearing-cutters B and B produce plane oblique cuts at a shortdistance outside of the circular cuts produced by the main cutters, asindicated in Fig. 15, where the cut produced by the right-handclearing-cutter B of the upper cutter-head is indicated by the dottedline 5 5, the cut produced by the left hand clearing-cutter B of thesame cutterhead is indicated by the line 6 6, the cut produced by theright-hand clearing-cutter of the lower cutter-head by the line 7 7, andthe cut produced by the left-hand clearing-cutter of the samecutter-head by the line 8 8.

The right-hand clearing-cutter B stands nearly at right angles to theright-hand main cutter A, as shown in Fig. 6, and has two outting-wings,which may be of the same width as the body or hub portion of the cutter.Each wing has its outer portion formed on its outer side with a planebevel g, which slopes outwardly or to the peripheral face g of the wingand toward the main cutter and extends from the front end to the rearend of the wing. The latter is provided at its front corner with anoblique front face 71, which is inclined laterally, rearwardly, andinwardly or toward the adjacent main cutter A and which has its cuttingedge h extending from the front corner 7L2 at the base of the planebevel g to the outer rear corner its on the peripheral face g of thewing, Figs. (3 and 7. The left-hand clearing-cutter B is similarlyconstructedthat is to say, it has along the outer portion of each wing aplane bevel 2', sloping to the peripheral face t" of the cutter andtoward the adjacent main cutter, and it has two oblique front faceswhich are inclined laterally, rearwardly, and inwardly or toward theadjacent main cutter A and each of which has its cutting cdgej extendingfrom the front corner j at the base of the plane bevel to the outer rearcoruerj in the peripheral face of the wing, Figs. 10, 11, 12, and 13.The inclined front faces of the clearing-cutters are inclined inopposite directions, those of the right-hand cutter B being inclinedtoward the left and those of the left-hand cutter B toward the right. Aseach clearing-cutter has two of these inclined front cutting edges, itmakes two cuts at each revolution.

As shown in the drawings, the right-hand main cutter A is seated in arecess 70, Figs. 3 and 5, in the side of the left-hand cutter A, andeach of the clearing-cutters B B is seated in a recess l in the side ofthe adjacent main cutter, Figs. 7 and 11.

I claim as my invention- 1. A rotary cutting-tool for woodworkingconsisting of two cutters arranged side by side and circurnferentiallyout of line with each other, each cutter being provided with a concavealong the inner side of its wings and at the front corner of saidconcave with a laterally-inclined front face which contains the cuttingedges, substantially as set forth.

2. A rotary cutting-tool for woodworking consisting of two cuttersarranged side by side, each provided with a concave along the inner sideof its wings and at the front corner of said concave with an obliquefront face containing the cutting edges, the said front faces beinginclined in opposite directions in the two cutters, substantially as setforth.

3. In a cutter-head for woodworking, the combination of two main cuttersarranged side by side, each provided with a concave along the inner sideof its wings and at the front corner of said concave with an obliquefront face containing the cutting edges, of two clearing-cuttersarranged outside of said main cutters, substantially as set forth.

at. In a cutter-head for woodworking, the combination of two maincutters arranged side by side, each provided with a concave along theinner side of its wings and at the front corner of said concave with anoblique front face containing the cutting edges, of two clearing-cuttersarranged outside of said main cutters and provided on their outer sideswith plain bevels sloping toward the peripheral edges of saidclearing-cutters and at the front ends of said bevels withlaterallyinclined front faces containing the cutting edges,substantially as set forth.

5. A rotary cutter for woodworking provided with two cutters arrangedcircumferentially one behind the other, each cutter being provided alongthe inner side of its outermost or peripheral portion with a concavewhich slopes transversely from the outermost portion of the cuttertoward the axis and toward the opposite side, and at the front corner ofsaid concave with a laterally-inclined front face which contains thecutting edges, said front faces beinginclined in opposite directions inthe two cutters, substantially as set forth.

itness my hand this 12th day of May, 1806.

GEORGE D. GILLEl"E.

Witnesses:

NATHANIEL STONE, WILFoRn LA SAZE.

